Chapter 5201000%C2%AD%C2%AD_… · Chapter 5 Body Rhythms and Mental States. ... A split in consciousness • Part of mind operated independent of consciousness • One part hidden

Chapter 5

Body Rhythms and Mental States

Biological Rhythms

• Biological rhythms –

– Regular fluctuation in biological system – up & down of functioning

• Entertainment – synchronized with external events (daylight, time, temp.)

• Endogenous – generated from within (without external cues)

• Circadian rhythms –

– Body’s clock• Suprachiasmatic nucleus

– Part of brain containing biological clock and governs circadian rhythms

• Meletonin– Hormone involved in regulation of circadian rhythm

• Internal desynchronization– Clock is out of sync – change time zones; jet lag; change in work shift

» Exxon Valdez; 3 Mile Island; Chernobyl

– Biological rhythms are not in phase (synchronized) with each other

– Biological rhythm within a period of approximately 24 hours• Average is 24.18 hours

• Cave study; 25 hour day; book; 30 hour day

– Plants, animals and insects

– Adaptation of organism in relation to rotation of earth on its axis

Moods and Long-Term Rhythms

• Seasonal Affective Disorder (SAD)

– Depression during winter; improvement in spring

– Daylight; fluorescent light

• Premenstrual syndrome – “PMS”

– Physical - bloating (water retention), cramps

– Emotional – irritable, depressed

– No real evidence

• Pre menstrual dysphoric disorder (PMDD)

– DSM – diagnostic statistical manual• Severe affect labiality- sadness, crying

• Anxiety

• Irritability

• Sleep changes

PMS / Testosterone

• Study 1988

• Do women’s moods differ from men’s in a predictable way because of women’s menstrual cycles?

– Look at: pleasantness, arousal level, stability of moods over time

• 15 woman on the Pill

• 12 normally cycling woman

• 15 men rate their mood

• None knew study on PMS, thought mood and health

• What do you think?

Sleep Rhythms• Rapid eye movement (REM)

• Non-REM

– 4 stages

90 minute cycle btw REM & non-REM sleep

Awake

Non-REM

Stage 1

Non – REM

Stage 2

Non –REM

Stage 3

Non- REM

Stage 4

REM

Non-REM

Stage 4

Non-REM

Stage 3

Non-REM

Stage 2

Non-REM

Stage 1

Sleep Rhythms– Awake

– Stage 1- light sleep- easily awakened – alpha waves small & irregular

– Stage 2 – minor sound not waken – sleep spindles- short bursts of rapid high peak alpha waves

– Stage 3 – breathing & pulse slowed– hard to wake – slow high peaked delta waves

– Stage 4 – deep sleep – shaking or loud noise to wake - sleepwalking- delta waves taken over

– REM Sleep – few minutes to 1 hour – dream- alpha & delta waves

Non REM and REM Sleep

Why We Sleep

• Physical– To stay alive

– Body restores itself

• Mental– Memory consolidation

– Consequences without sleep

• Stress – cortisol

• Damage or impair brain cells

– Sleep disorders

• Sleep apnea – breathing stops periodically; gasp – wake momentarily

• Narcolepsy – sudden & unpredictable daytime sleepiness

lapses into REM sleep

Quick Quiz

A) Match each term with the appropriate phase

1. REM periods a. delta waves and talking in sleep

2. Alpha b. irregular brain waves and light sleep

3. Stage 4 sleep c. relaxed but awake

4. Stage 1 sleep d. active brain but inactive muscles

B) Sleep is necessary for normal

A) Physical and mental functioning

B) Mental functioning but not physical functions

C) Physical functioning but not mental functioning

C) True or False: Most people need more than 6 hours of sleep.

D) True or False: Only REM sleep has been associated with dreaming &

memory consolidation.

4 Approaches of Exploring Dreams

• Lucid dream – know you are dreaming

1) Psychoanalytic

Dreams as unconscious wishes –

– Freud – “royal road to the unconscious”

– Manifest content – aspect consciously experienced

– Latent content – hidden – symbolic (can be related to sex)

2) Problem focused approach

Dreams as a way to deal with problems

– Insight into emotional effects of daily life

• Dream of drowning – feeling overloaded with work / home / school

3) Cognitive approach

Dreams as thinking

– Brain working in sleep like when awake

– Express concerns; not problem solving

4) Activation-synthesis

Dreams interpreted brain activity

– cortical synthesis and interpretation of neural signals

Which Dream Theory is This?

Evaluating Dream Theories

• Psychoanalytic - Freud

– PRO: dreams do have meaning

– CON: parts far fetched

• Problem focused –

– PRO: dreams related to problems

– CON: doubt solve them

• Cognitive –

– PRO: same as waking life; express concerns;

– CON: yet to be tested

• Activation – synthesis –

– PRO: random signals

– CON: not explain story-like dreams

Which Approach Matches Statement

• In his dream, James is on a playground crawling through tunnel looking for something he lost.

1. James recently found his lost iPhone.

2. James just broke up with his significant other and is working through the emotions.

3. While James is sleeping, neurons are signaling.

4. James has repressed his sexual attraction to his mother and the tunnel represents her vagina.

Hypnosis• Hypnosis-

– practitioner • suggests changes in subject’s sensation, perception, thoughts, feelings or behavior

– Subject• Tries to alter sensation, perception, thoughts, feelings or behavior

• 6 Points of Hypnosis

1. Hypnotic responsiveness depends on subject more than practitioner

2. Hypnotized people can not be forced to do things against their will

1. Pass to let go of inhibitions

3. Feats preformed under hypnosis can be performed by motivated people

4. Hypnosis does not increase accuracy of memory

5. Hypnosis does not produce re-experiencing of long-ago events

6. Hypnotic suggestions effective for medical & psychological purposes1. Pain management; stress & anxiety

Theories of Hypnosis

• Dissociation Theories

– Compared to lucid dreaming or simple distraction

1) A split in consciousness• Part of mind operated independent of consciousness

• One part hidden observer; watching not participating

• Unless given special instruction; hypnotized part unaware of observer

– Experiment – Ernest Hilgard

• Hypnotized subject & ice water

• Attempt to question hidden observer directly– Arm in ice told minor pain

– Told feel minor pain

– Submerged hand in ice could signal pain with key

» Stated felt no pain

» Hand repeatedly pressed key

Theories of Hypnosis2) Dissociation between executive system (frontal lobes) & other brain systems

• Hypnotist – induces state split; hidden observer / executive & rest of mind respond

• Socio-cognitive Approach

– Interaction btw social (socio) influences & abilities, beliefs / expectations (cognitive)• Hypnotist –” you’re going back in time” + subject “I believe in age regression” = subject conforms

Quick Quiz

• True or False1) A hypnotized person is usually aware of what is going on and remembers

the experience later.

2) Hypnosis give us special powers that we do not ordinarily have.

3) Hypnosis reduces errors in memory.

4) Hypnotized people play no active part in controlling their behavior and thoughts.

5) According to Hilgard, hypnosis is a state of consciousness involving a “hidden observer”.

6) Socio-cognitive theorists view hypnosis as are faking or conscious playacting.

Consciousness Altering Drugs

Drug Categories

Depressants

Stimulants

Hallucinogens

Narcotics

Designer

Inhalants

Depressants

• Alcohol*

• Tranquilizers

• Barbiturates

• Anti-anxiety (benzodiazepine)

– Valium

– Xanax

– Librium

– Klonopine

• Valium

• “Downers”

• Sleeping Pills

• Slurred Speech

• Lethargic

• Mood Swings

• Poor Co-ordination

• Poor Judgment

• Slowed Reaction Time

• Constricted Pupils

Alcohol

• Alcohol involvement: 39% of those in prison for violence• 39% of traffic fatalities• 67% in domestic violence• 40% in rape• 72% date rape • 50% child abuse and neglect• 23% of suicide

• Youth 3rd leading cause of death (21 yrs highest alcohol use)

– Unintentional; drowning, vehicle accidents– Suicide– Homicide

• Adults– Liver disease– Pancreatitis– Alcohol poisoning– Diabetes

Which has more alcohol?

5 ½ oz wine 12 oz beer 1 shot liquor

5 ½ oz wine = 12 oz beer = 1 shot liquor

All contain approximately ½ oz alcohol

How do you sober up?

How do you sober up?

• Time and Liver

• One hour for every ½ once of alcohol

• What does not work:

– Showers

– Coffee

– Exercise

Alcohol and Driving

• Slowed reaction time

• Poor co-ordination

• Poor judgment

• BAC

– .08 – Buzzed (impaired vision)

– .15 – Really buzzed (stagger; gross motor decreases)

– .20 – Wasted (poor motor skills; unconscious)

– .30 – Danger ( impaired breathing; decreased heart)

– .40 - Death (comatose)

• BAC peak 30 – 45 minutes after consumption

Should you drive?

Metabolism & Alcohol• Liver:

– organ that metabolizes alcohol – alcohol circulates in the bloodstream (every cell) until metabolized – Alcohol = acetaldehyde = acetic acid = carbon dioxide & water

(poison)

Alcohol absorbed through stomach and 80% small intestine• People metabolize approx. ½ oz. Per hour

• 5 ½ oz glass of wine• 12 oz glass of beer• 1 shot

• Men have special enzymes help.

• Women metabolize ½ the rate of men

• Youth addicted in 2 years

• Adults addicted in 7 years

• Flushing in Asians

• Synergy -.– Multiplying effect of 2 drugs 2 + 2 = 10– One drug to come down from another

• Tylenol plus Alcohol >liver failure.

Alcohol continued• Health effects—heart; liver; pancreas; diabetes

• 7-10% of drinkers get addicted– Tolerance

• woman with .26 BAC• 0.4 B.A.C. may be comatose

– Withdrawal (tremors, nausea) • 24 hours to 3 to 4 days• hangover

• Tolerance reversal – Liver shot so handle less

• Cross tolerance– High tolerance for drugs in same category

• Blackouts: – common at 0.3 BAC– Chemical induced amnesia– Court cases – confess; different hand use; life instead of death

• College students; male vs female

Medical Consequences: Alcohol

• Brain– Shrinkage of brain– Poison of brain cells– Damage to nervous system

• Wernicke syndrome – Paralysis of normal eye movementConfusionProblems with balance

• Korsakoff psychosis – “Wet brain”Long term brain damageconfusion and memory lossConfabulation – fantasizing to fill gaps

• Peripheral neuropathy - lack of Vitamin B

• Malnutrition

• Liver damage…removes toxins from blood– Alcoholic hepatitis 2nd stage liver damage– Cirrhosis

• Yellow skin tone– immune system breakdown

• Heart – nicotine, cocaine

Fetal Alcohol Syndrome:small head circumference

low nasal bridgeshort face

Stimulants• Cocaine*

• Methamphetamine *

• Amphetamines

• Nicotine* / Caffeine

• “Speed” / “uppers”

• Ritalin

• Diet Pills

• Increased Heart Rate

• Lack of appetite

• Sense of well being

• Sense of arousal

• Often leave & return

• Heart Attack

• Increased Movement

• Increased Speech

• Fidgety – “Hyper”

• Aggressive

• Bloody Nose

• Dilated Pupil

Stimulants

Cocaine• Cocaine- crack and powder

– in urine 3 days

– Chew, snort or smoke

– smoked for faster high

– Crack• H20, ammonia & baking soda

– Freebasing• Mix with combustibles (Richard Prior)

• Brain blocks reuptake of dopamine

– Addicted rats die

– Heart attack

– Dehydration

– Starvation

• Cocaine/nicotine easiest to get addicted

Meth– Snort, inject, smoke– Ephedrine /

psudoephedrine– Developed for soldiers– Tooth decay

• leading cause of emergency room visits for illicit drugs

• Anhedonia-

inability to feel pleasure due to drug-induced brain injury

• Paranoia / delusions

The Brain and Addiction

Cocaine in the Brain

Slides are from the National Institute on Drug Abuse (NIDA) (www.nida.nih.gov)

•Depletion following cocaine use. (Nicotine)

The loss of red areas in the right scan indicates that the brain is using less glucose ----less active. ----reduction in activity results in disruption of many brain functions.

Nicotine

• Can both stimulate and relax

• Natural insecticide

• 90% lung cancer deaths

• 3,000 die from secondhand smoke

• 80-90 % emphysema & chronic lung disease

• 80-95% of alcoholics smoke – reduces alcohol effects.

– Smokers 10 x more likely to become alcoholic (which can first)

• Nicotine decreases BAC levels

• Nicotine and cocaine easiest to get addicted

Narcotics

• Pain Killers

• Morphine– Extract of opium

• Codeine

• Opium– from opium poppy

• Vicodin

• Heroin– Synthetic opium– Smoked, snorted or injected– Treated: methadone clinic– “Trainspotting”

• Oxycontin– For cancer patients– Long lasting

• Same as Depressants

• Prescribed by Doctor

• Needle Marks

• Flu – like symptoms

Hallucinogens

• Marijuana *

• LSD / Acid– Microdot

– Blotter

– Windowpane

• Psilocybin Mushrooms– Mescaline

– “Magic” / “shrooms”

• Peyote Cactus– “Buttons”

• Bufotenine Toad

• PCP

• See Things Not There

• Hear Things Not There

• Combative

• Blank Stare

• Anxiety / Paranoia

• Lack of Pain

• Slurred Speech

• Sense of indestructibility

• Flashbacks

• *marijuana on next slide

Cannabis

• Marijuana – Weed– Pot– Smoke– Grass

• Hash– Made from resin

• THC, the psychoactive ingredient, • Delta 9 Tetrahydocannabinol

– lowers blood glucose – Gaiety, laughter – increases appetite– Stored in fat cells– long term use possibly associated with apathy

• 10 – 30 times more potent than “back in the day” (60s-70s)

Designer Drugs

• Man Made

• Basement Lab

• Party Drugs

– Rave Parties

• Ecstasy

– MDMA methylenedioxymethamphetamine

– Once used to treat trauma patients

1. Hallucinogen & Stimulant

• Confidence

• Sense of arousal

2. Dehydrate

• Dry / sore mouth & throat

3. High Blood Pressure

4. Body Temp. 110*

5. Can’t get back to original high / brain changes

• Date Rape

– Unconscious

– Odorless / colorless

1. Gamma-hydroxybutyrate “GHB”

2. Rohypnol “Roofies”

Long Term Effects of Ecstasy

• Liver damage

• Anxiety disorders

• Irregular heartbeats

• Brain damage

• Depression

• Confusion

• Paranoia

Inhalants

• House Hold Items1. Glue

2. White Out

3. Paint

4. Thinner

5. Solvents

6. Aerosols

• Varied Effects

• Increase Heart Rate

• Decrease Heart Rate

• Headache

• Dizziness

• Loss of Sense of Smell

• Paint at Nose/Mouth

• Lung Collapse

• Confusion

The Brain

• Adaptation

• Addicted brain

– Different due to chemical changes from use

– Cravings

– Drug rush

– Memory of past euphoria

• Euphoric recall

– Use to alleviate withdrawal

Brain Regions and Their Functions

Nervous System Chemicals

Neurotransmitters (affected by drug use)

• Serotonin – sleep; pain suppression; mood

adult male; alcohol & decreased serotonin = suicide

• Dopamine – learning; memory; emotion;

pleasure or reward “feel good” neurotransmitter

cocaine use – depletion = crash

• GABA - (gamma-aminobutyric acid) major inhibitory neurotransmitter in brain

alcohol

Why do People do Drugs?

The Brain and Addiction

Addictive Substances ^ DopamineSubstance / Activity

• Food / Sex

• Cannabis

• Ethanol

• Nicotine

• Heroin / Morphine

• Cocaine

• Amphetamines

Peak Dopamine Release

• 50 – 100%

• 125 – 175%

• 125 – 200 %

• 224%

• 150- 300%

• 400%

• 1000%

Memory and Craving

• Addict never gets original high—brain has changed

• Addiction is a brain disease

• Cues can trigger memory…

– Picture of alcoholic beverages activates certain areas of the brain.

– Smell

– Being in bar

• Prozac reduces craving by regulating serotonin levels

• Medications to reduce cravings– Antabuse (old) made you sick if drank alcohol (mouthwash)

– Campral (new) reduce cravings and reduce relapse length

Genetics and Alcoholism

• 4 times more likely if parent alcoholic

• 5 risk genes (so far)

• 1 protective gene; ALDH (flushing ability)

• Addition very heritable….40-65%

• Orbitofrontal & Dorsolateral Functioning(Satiety) (Inhibition)